pwm to voltage calculator
Convert PWM duty cycle to DC voltage instantly. Enter supply voltage and duty cycle (%) to calculate the average output voltage of a PWM signal.
pwm duty cycle voltage
PWM duty cycle to voltage can be calculated by multiplying the supply voltage with duty cycle ratio:Vout=( Duty Cycle % / 100 ) x Supply Voltage. Put in duty cycle and supply voltage to obtain a quick result.
Formula & Table Summary:
Vout = (Duty Cycle% / 100) × Supply Voltage
Duty Cycle in %, Vsup in volts. Ideal for DC, filtered PWM, or purely resistive loads.
duty cycle to voltage tool
A Pulse Width Modulation signal transforms the average DC voltage to a PWM signal that is served to have an estimate of the duty cycle and supply voltage of a Pulse Width Modulation signal. The signals are sent as PWM to switch quickly between the on and off states, and the duty cycle determines the average voltage realized across an external load, which is proportional to the duty cycle. Very simple is Vout = ( Duty Cycle% /100 ) Vsup. This is essential in motor control and LED control, among other equally pointed devices, where much control over the exact voltage is achieved using digital control. The inversion in the determination of average voltage is that it is normally smoothed through a low-pass filter in a circuit to give an estimate of a steady DC value. The device is ideal in reminding fast electronics designers, engineers, and students to relate PWM settings to real load voltage.
pwm voltage math
| Duty Cycle (%) | Supply Voltage (V) | Calculation | Output Voltage (V) |
|---|---|---|---|
| 25 | 12 | (25/100) × 12 | 3.0 |
| 50 | 5 | (50/100) × 5 | 2.5 |
| 75 | 24 | (75/100) × 24 | 18.0 |
| 100 | 3.3 | (100/100) × 3.3 | 3.3 |
Frequently Asked Questions - pwm to voltage calculator:
How do I convert PWM to voltage?
Multiply duty cycle fraction by supply voltage: Vout = (Duty% / 100) × Vsup.
What units should I use?
Duty cycle in %, voltage in volts (V).
Does filtering change the result?
Yes, a low-pass filter smooths PWM to a near-DC voltage close to Vout.
Is PWM voltage same as RMS voltage?
No, average voltage differs from RMS unless duty cycle and waveform match specific conditions.
Can PWM control current?
Indirectly, by adjusting average voltage, PWM affects load current according to Ohm's law.
What if supply voltage changes?
Recalculate Vout using the new supply voltage with same duty cycle.
Can I enter decimal duty cycles?
Yes, use any value from 0 to 100% with decimal precision.
How accurate is this for motors?
For motors with inertia, output speed correlates with average voltage, but torque and inductance affect response.
What is 0% duty cycle voltage?
0 V — the output is always off.
What is 100% duty cycle voltage?
Equal to the supply voltage — output is always on.
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